Langer's Sudoku Assistant

Invalid Sudoku!

Row 7 is invalid. Column 4 is invalid. The top center 3x3 Box is invalid. Go back and make a different choice.

 

1
9
2
7
3
4
5
       
      6
   8   
       
      6
   8   
3
6
4
5
5
8
1
2
7
7
8
5
1
6
1  2  3
4  5  6
7  8  9
4
9
3
3
2
7
8
5
9
6
4
1
6
4
5
2
3
1
8
7
9
9
1
8
6
7
4
3
5
2
2
1
3
9
7
       
   5   
   8   
4
       
      6
   8   
       
   5  6
   8   
5
8
6
4
1
2
7
9
3
8
4
7
       
   5   
   8   
3
6
       
   5   
   8   
2
1

 

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